<template>
  <div class="icons">
    <swiper :options="swiperOptions">
      <!-- 遍历分组好的数组 -->
      <swiper-slide v-for="(page, index) of pages" :key="index">
        <!-- 对组内的数据进行遍历 -->
        <div class="icon" v-for="item of page" :key="item.id">
          <div class="icon-img">
            <img class="icon-img-content" alt="" :src="item.imgUrl" />
          </div>
          <p class="icon-desc">{{ item.desc }}</p>
        </div>
      </swiper-slide>
    </swiper>
  </div>
</template>

<script>
export default {
  name: 'HomeIcons',
  props: { list: Array },
  data () {
    return {
      swiperOptions: { autoplay: false }
    }
  },
  computed: {
    // 对数据进行分页
    pages () {
      const pages = []
      this.list.forEach((item, index) => {
        // 下标除以单页总数，对数值进行向下取整
        const page = Math.floor(index / 8)
        // 如果不存在则创建一个空数组，用于存放数据
        if (!pages[page]) { pages[page] = [] }
        // 将item添加到对应页数的数组中
        pages[page].push(item)
      })
      return pages
    }
  }
}
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
@import '~styles/mixins.styl'
.icons >>> .swiper-container
  height: 0
  padding-bottom: 50%

.icons
  margin-top: .1rem

  .icon
    position: relative
    overflow: hidden
    float: left
    width: 25%
    height: 0
    padding-bottom: 25%

    .icon-img
      position: absolute
      top: 0
      left: 0
      right: 0
      bottom: .44rem
      box-sizing: border-box
      padding: .1rem

      .icon-img-content
        display: block
        margin: 0 auto
        height: 100%

    .icon-desc
      position: absolute
      left: 0
      right: 0
      bottom: 0
      height: .44rem
      line-height: .44rem
      text-align: center
      color: $darkTextColor
      ellipsis()
</style>
